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1 | /* |
2 | * tps65010 - driver for tps6501x power management chips |
3 | * |
4 | * Copyright (C) 2004 Texas Instruments |
5 | * Copyright (C) 2004-2005 David Brownell |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify |
8 | * it under the terms of the GNU General Public License as published by |
9 | * the Free Software Foundation; either version 2 of the License, or |
10 | * (at your option) any later version. |
11 | * |
12 | * This program is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * GNU General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU General Public License |
18 | * along with this program; if not, write to the Free Software |
19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 | */ |
21 | |
22 | #include <linux/kernel.h> |
23 | #include <linux/module.h> |
24 | #include <linux/init.h> |
25 | #include <linux/slab.h> |
26 | #include <linux/interrupt.h> |
27 | #include <linux/i2c.h> |
28 | #include <linux/delay.h> |
29 | #include <linux/workqueue.h> |
30 | #include <linux/debugfs.h> |
31 | #include <linux/seq_file.h> |
32 | #include <linux/mutex.h> |
33 | #include <linux/platform_device.h> |
34 | |
35 | #include <linux/i2c/tps65010.h> |
36 | |
37 | #include <asm/gpio.h> |
38 | |
39 | |
40 | /*-------------------------------------------------------------------------*/ |
41 | |
42 | #define DRIVER_VERSION "2 May 2005" |
43 | #define DRIVER_NAME (tps65010_driver.driver.name) |
44 | |
45 | MODULE_DESCRIPTION("TPS6501x Power Management Driver"); |
46 | MODULE_LICENSE("GPL"); |
47 | |
48 | static struct i2c_driver tps65010_driver; |
49 | |
50 | /*-------------------------------------------------------------------------*/ |
51 | |
52 | /* This driver handles a family of multipurpose chips, which incorporate |
53 | * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs, |
54 | * and other features often needed in portable devices like cell phones |
55 | * or digital cameras. |
56 | * |
57 | * The tps65011 and tps65013 have different voltage settings compared |
58 | * to tps65010 and tps65012. The tps65013 has a NO_CHG status/irq. |
59 | * All except tps65010 have "wait" mode, possibly defaulted so that |
60 | * battery-insert != device-on. |
61 | * |
62 | * We could distinguish between some models by checking VDCDC1.UVLO or |
63 | * other registers, unless they've been changed already after powerup |
64 | * as part of board setup by a bootloader. |
65 | */ |
66 | enum tps_model { |
67 | TPS65010, |
68 | TPS65011, |
69 | TPS65012, |
70 | TPS65013, |
71 | }; |
72 | |
73 | struct tps65010 { |
74 | struct i2c_client *client; |
75 | struct mutex lock; |
76 | struct delayed_work work; |
77 | struct dentry *file; |
78 | unsigned charging:1; |
79 | unsigned por:1; |
80 | unsigned model:8; |
81 | u16 vbus; |
82 | unsigned long flags; |
83 | #define FLAG_VBUS_CHANGED 0 |
84 | #define FLAG_IRQ_ENABLE 1 |
85 | |
86 | /* copies of last register state */ |
87 | u8 chgstatus, regstatus, chgconf; |
88 | u8 nmask1, nmask2; |
89 | |
90 | u8 outmask; |
91 | struct gpio_chip chip; |
92 | struct platform_device *leds; |
93 | }; |
94 | |
95 | #define POWER_POLL_DELAY msecs_to_jiffies(5000) |
96 | |
97 | /*-------------------------------------------------------------------------*/ |
98 | |
99 | #if defined(DEBUG) || defined(CONFIG_DEBUG_FS) |
100 | |
101 | static void dbg_chgstat(char *buf, size_t len, u8 chgstatus) |
102 | { |
103 | snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n", |
104 | chgstatus, |
105 | (chgstatus & TPS_CHG_USB) ? " USB" : "", |
106 | (chgstatus & TPS_CHG_AC) ? " AC" : "", |
107 | (chgstatus & TPS_CHG_THERM) ? " therm" : "", |
108 | (chgstatus & TPS_CHG_TERM) ? " done" : |
109 | ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) |
110 | ? " (charging)" : ""), |
111 | (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "", |
112 | (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "", |
113 | (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "", |
114 | (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : ""); |
115 | } |
116 | |
117 | static void dbg_regstat(char *buf, size_t len, u8 regstatus) |
118 | { |
119 | snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n", |
120 | regstatus, |
121 | (regstatus & TPS_REG_ONOFF) ? "off" : "(on)", |
122 | (regstatus & TPS_REG_COVER) ? " uncover" : "", |
123 | (regstatus & TPS_REG_UVLO) ? " UVLO" : "", |
124 | (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "", |
125 | (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "", |
126 | (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "", |
127 | (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "", |
128 | (regstatus & TPS_REG_PG_CORE) ? " core_bad" : ""); |
129 | } |
130 | |
131 | static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig) |
132 | { |
133 | const char *hibit; |
134 | |
135 | if (por) |
136 | hibit = (chgconfig & TPS_CHARGE_POR) |
137 | ? "POR=69ms" : "POR=1sec"; |
138 | else |
139 | hibit = (chgconfig & TPS65013_AUA) ? "AUA" : ""; |
140 | |
141 | snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n", |
142 | chgconfig, hibit, |
143 | (chgconfig & TPS_CHARGE_RESET) ? " reset" : "", |
144 | (chgconfig & TPS_CHARGE_FAST) ? " fast" : "", |
145 | ({int p; switch ((chgconfig >> 3) & 3) { |
146 | case 3: p = 100; break; |
147 | case 2: p = 75; break; |
148 | case 1: p = 50; break; |
149 | default: p = 25; break; |
150 | }; p; }), |
151 | (chgconfig & TPS_VBUS_CHARGING) |
152 | ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100) |
153 | : 0, |
154 | (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No"); |
155 | } |
156 | |
157 | #endif |
158 | |
159 | #ifdef DEBUG |
160 | |
161 | static void show_chgstatus(const char *label, u8 chgstatus) |
162 | { |
163 | char buf [100]; |
164 | |
165 | dbg_chgstat(buf, sizeof buf, chgstatus); |
166 | pr_debug("%s: %s %s", DRIVER_NAME, label, buf); |
167 | } |
168 | |
169 | static void show_regstatus(const char *label, u8 regstatus) |
170 | { |
171 | char buf [100]; |
172 | |
173 | dbg_regstat(buf, sizeof buf, regstatus); |
174 | pr_debug("%s: %s %s", DRIVER_NAME, label, buf); |
175 | } |
176 | |
177 | static void show_chgconfig(int por, const char *label, u8 chgconfig) |
178 | { |
179 | char buf [100]; |
180 | |
181 | dbg_chgconf(por, buf, sizeof buf, chgconfig); |
182 | pr_debug("%s: %s %s", DRIVER_NAME, label, buf); |
183 | } |
184 | |
185 | #else |
186 | |
187 | static inline void show_chgstatus(const char *label, u8 chgstatus) { } |
188 | static inline void show_regstatus(const char *label, u8 chgstatus) { } |
189 | static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { } |
190 | |
191 | #endif |
192 | |
193 | #ifdef CONFIG_DEBUG_FS |
194 | |
195 | static int dbg_show(struct seq_file *s, void *_) |
196 | { |
197 | struct tps65010 *tps = s->private; |
198 | u8 value, v2; |
199 | unsigned i; |
200 | char buf[100]; |
201 | const char *chip; |
202 | |
203 | switch (tps->model) { |
204 | case TPS65010: chip = "tps65010"; break; |
205 | case TPS65011: chip = "tps65011"; break; |
206 | case TPS65012: chip = "tps65012"; break; |
207 | case TPS65013: chip = "tps65013"; break; |
208 | default: chip = NULL; break; |
209 | } |
210 | seq_printf(s, "driver %s\nversion %s\nchip %s\n\n", |
211 | DRIVER_NAME, DRIVER_VERSION, chip); |
212 | |
213 | mutex_lock(&tps->lock); |
214 | |
215 | /* FIXME how can we tell whether a battery is present? |
216 | * likely involves a charge gauging chip (like BQ26501). |
217 | */ |
218 | |
219 | seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) "); |
220 | |
221 | |
222 | /* registers for monitoring battery charging and status; note |
223 | * that reading chgstat and regstat may ack IRQs... |
224 | */ |
225 | value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG); |
226 | dbg_chgconf(tps->por, buf, sizeof buf, value); |
227 | seq_printf(s, "chgconfig %s", buf); |
228 | |
229 | value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS); |
230 | dbg_chgstat(buf, sizeof buf, value); |
231 | seq_printf(s, "chgstat %s", buf); |
232 | value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1); |
233 | dbg_chgstat(buf, sizeof buf, value); |
234 | seq_printf(s, "mask1 %s", buf); |
235 | /* ignore ackint1 */ |
236 | |
237 | value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS); |
238 | dbg_regstat(buf, sizeof buf, value); |
239 | seq_printf(s, "regstat %s", buf); |
240 | value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2); |
241 | dbg_regstat(buf, sizeof buf, value); |
242 | seq_printf(s, "mask2 %s\n", buf); |
243 | /* ignore ackint2 */ |
244 | |
245 | (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY); |
246 | |
247 | |
248 | /* VMAIN voltage, enable lowpower, etc */ |
249 | value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1); |
250 | seq_printf(s, "vdcdc1 %02x\n", value); |
251 | |
252 | /* VCORE voltage, vibrator on/off */ |
253 | value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2); |
254 | seq_printf(s, "vdcdc2 %02x\n", value); |
255 | |
256 | /* both LD0s, and their lowpower behavior */ |
257 | value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1); |
258 | seq_printf(s, "vregs1 %02x\n\n", value); |
259 | |
260 | |
261 | /* LEDs and GPIOs */ |
262 | value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON); |
263 | v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER); |
264 | seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n", |
265 | (value & 0x80) |
266 | ? ((v2 & 0x80) ? "on" : "off") |
267 | : ((v2 & 0x80) ? "blink" : "(nPG)"), |
268 | value, v2, |
269 | (value & 0x7f) * 10, (v2 & 0x7f) * 100); |
270 | |
271 | value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON); |
272 | v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER); |
273 | seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n", |
274 | (value & 0x80) |
275 | ? ((v2 & 0x80) ? "on" : "off") |
276 | : ((v2 & 0x80) ? "blink" : "off"), |
277 | value, v2, |
278 | (value & 0x7f) * 10, (v2 & 0x7f) * 100); |
279 | |
280 | value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO); |
281 | v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3); |
282 | seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2); |
283 | |
284 | for (i = 0; i < 4; i++) { |
285 | if (value & (1 << (4 + i))) |
286 | seq_printf(s, " gpio%d-out %s\n", i + 1, |
287 | (value & (1 << i)) ? "low" : "hi "); |
288 | else |
289 | seq_printf(s, " gpio%d-in %s %s %s\n", i + 1, |
290 | (value & (1 << i)) ? "hi " : "low", |
291 | (v2 & (1 << i)) ? "no-irq" : "irq", |
292 | (v2 & (1 << (4 + i))) ? "rising" : "falling"); |
293 | } |
294 | |
295 | mutex_unlock(&tps->lock); |
296 | return 0; |
297 | } |
298 | |
299 | static int dbg_tps_open(struct inode *inode, struct file *file) |
300 | { |
301 | return single_open(file, dbg_show, inode->i_private); |
302 | } |
303 | |
304 | static const struct file_operations debug_fops = { |
305 | .open = dbg_tps_open, |
306 | .read = seq_read, |
307 | .llseek = seq_lseek, |
308 | .release = single_release, |
309 | }; |
310 | |
311 | #define DEBUG_FOPS &debug_fops |
312 | |
313 | #else |
314 | #define DEBUG_FOPS NULL |
315 | #endif |
316 | |
317 | /*-------------------------------------------------------------------------*/ |
318 | |
319 | /* handle IRQS in a task context, so we can use I2C calls */ |
320 | static void tps65010_interrupt(struct tps65010 *tps) |
321 | { |
322 | u8 tmp = 0, mask, poll; |
323 | |
324 | /* IRQs won't trigger for certain events, but we can get |
325 | * others by polling (normally, with external power applied). |
326 | */ |
327 | poll = 0; |
328 | |
329 | /* regstatus irqs */ |
330 | if (tps->nmask2) { |
331 | tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS); |
332 | mask = tmp ^ tps->regstatus; |
333 | tps->regstatus = tmp; |
334 | mask &= tps->nmask2; |
335 | } else |
336 | mask = 0; |
337 | if (mask) { |
338 | tps->regstatus = tmp; |
339 | /* may need to shut something down ... */ |
340 | |
341 | /* "off" usually means deep sleep */ |
342 | if (tmp & TPS_REG_ONOFF) { |
343 | pr_info("%s: power off button\n", DRIVER_NAME); |
344 | #if 0 |
345 | /* REVISIT: this might need its own workqueue |
346 | * plus tweaks including deadlock avoidance ... |
347 | * also needs to get error handling and probably |
348 | * an #ifdef CONFIG_HIBERNATION |
349 | */ |
350 | hibernate(); |
351 | #endif |
352 | poll = 1; |
353 | } |
354 | } |
355 | |
356 | /* chgstatus irqs */ |
357 | if (tps->nmask1) { |
358 | tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS); |
359 | mask = tmp ^ tps->chgstatus; |
360 | tps->chgstatus = tmp; |
361 | mask &= tps->nmask1; |
362 | } else |
363 | mask = 0; |
364 | if (mask) { |
365 | unsigned charging = 0; |
366 | |
367 | show_chgstatus("chg/irq", tmp); |
368 | if (tmp & (TPS_CHG_USB|TPS_CHG_AC)) |
369 | show_chgconfig(tps->por, "conf", tps->chgconf); |
370 | |
371 | /* Unless it was turned off or disabled, we charge any |
372 | * battery whenever there's power available for it |
373 | * and the charger hasn't been disabled. |
374 | */ |
375 | if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC)) |
376 | && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) |
377 | && (tps->chgconf & TPS_CHARGE_ENABLE) |
378 | ) { |
379 | if (tps->chgstatus & TPS_CHG_USB) { |
380 | /* VBUS options are readonly until reconnect */ |
381 | if (mask & TPS_CHG_USB) |
382 | set_bit(FLAG_VBUS_CHANGED, &tps->flags); |
383 | charging = 1; |
384 | } else if (tps->chgstatus & TPS_CHG_AC) |
385 | charging = 1; |
386 | } |
387 | if (charging != tps->charging) { |
388 | tps->charging = charging; |
389 | pr_info("%s: battery %scharging\n", |
390 | DRIVER_NAME, charging ? "" : |
391 | ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) |
392 | ? "NOT " : "dis")); |
393 | } |
394 | } |
395 | |
396 | /* always poll to detect (a) power removal, without tps65013 |
397 | * NO_CHG IRQ; or (b) restart of charging after stop. |
398 | */ |
399 | if ((tps->model != TPS65013 || !tps->charging) |
400 | && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))) |
401 | poll = 1; |
402 | if (poll) |
403 | (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY); |
404 | |
405 | /* also potentially gpio-in rise or fall */ |
406 | } |
407 | |
408 | /* handle IRQs and polling using keventd for now */ |
409 | static void tps65010_work(struct work_struct *work) |
410 | { |
411 | struct tps65010 *tps; |
412 | |
413 | tps = container_of(work, struct tps65010, work.work); |
414 | mutex_lock(&tps->lock); |
415 | |
416 | tps65010_interrupt(tps); |
417 | |
418 | if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) { |
419 | int status; |
420 | u8 chgconfig, tmp; |
421 | |
422 | chgconfig = i2c_smbus_read_byte_data(tps->client, |
423 | TPS_CHGCONFIG); |
424 | chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING); |
425 | if (tps->vbus == 500) |
426 | chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING; |
427 | else if (tps->vbus >= 100) |
428 | chgconfig |= TPS_VBUS_CHARGING; |
429 | |
430 | status = i2c_smbus_write_byte_data(tps->client, |
431 | TPS_CHGCONFIG, chgconfig); |
432 | |
433 | /* vbus update fails unless VBUS is connected! */ |
434 | tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG); |
435 | tps->chgconf = tmp; |
436 | show_chgconfig(tps->por, "update vbus", tmp); |
437 | } |
438 | |
439 | if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags)) |
440 | enable_irq(tps->client->irq); |
441 | |
442 | mutex_unlock(&tps->lock); |
443 | } |
444 | |
445 | static irqreturn_t tps65010_irq(int irq, void *_tps) |
446 | { |
447 | struct tps65010 *tps = _tps; |
448 | |
449 | disable_irq_nosync(irq); |
450 | set_bit(FLAG_IRQ_ENABLE, &tps->flags); |
451 | (void) schedule_work(&tps->work.work); |
452 | return IRQ_HANDLED; |
453 | } |
454 | |
455 | /*-------------------------------------------------------------------------*/ |
456 | |
457 | /* offsets 0..3 == GPIO1..GPIO4 |
458 | * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes) |
459 | * offset 6 == vibrator motor driver |
460 | */ |
461 | static void |
462 | tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value) |
463 | { |
464 | if (offset < 4) |
465 | tps65010_set_gpio_out_value(offset + 1, value); |
466 | else if (offset < 6) |
467 | tps65010_set_led(offset - 3, value ? ON : OFF); |
468 | else |
469 | tps65010_set_vib(value); |
470 | } |
471 | |
472 | static int |
473 | tps65010_output(struct gpio_chip *chip, unsigned offset, int value) |
474 | { |
475 | /* GPIOs may be input-only */ |
476 | if (offset < 4) { |
477 | struct tps65010 *tps; |
478 | |
479 | tps = container_of(chip, struct tps65010, chip); |
480 | if (!(tps->outmask & (1 << offset))) |
481 | return -EINVAL; |
482 | tps65010_set_gpio_out_value(offset + 1, value); |
483 | } else if (offset < 6) |
484 | tps65010_set_led(offset - 3, value ? ON : OFF); |
485 | else |
486 | tps65010_set_vib(value); |
487 | |
488 | return 0; |
489 | } |
490 | |
491 | static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset) |
492 | { |
493 | int value; |
494 | struct tps65010 *tps; |
495 | |
496 | tps = container_of(chip, struct tps65010, chip); |
497 | |
498 | if (offset < 4) { |
499 | value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO); |
500 | if (value < 0) |
501 | return 0; |
502 | if (value & (1 << (offset + 4))) /* output */ |
503 | return !(value & (1 << offset)); |
504 | else /* input */ |
505 | return (value & (1 << offset)); |
506 | } |
507 | |
508 | /* REVISIT we *could* report LED1/nPG and LED2 state ... */ |
509 | return 0; |
510 | } |
511 | |
512 | |
513 | /*-------------------------------------------------------------------------*/ |
514 | |
515 | static struct tps65010 *the_tps; |
516 | |
517 | static int __exit tps65010_remove(struct i2c_client *client) |
518 | { |
519 | struct tps65010 *tps = i2c_get_clientdata(client); |
520 | struct tps65010_board *board = client->dev.platform_data; |
521 | |
522 | if (board && board->teardown) { |
523 | int status = board->teardown(client, board->context); |
524 | if (status < 0) |
525 | dev_dbg(&client->dev, "board %s %s err %d\n", |
526 | "teardown", client->name, status); |
527 | } |
528 | if (client->irq > 0) |
529 | free_irq(client->irq, tps); |
530 | cancel_delayed_work(&tps->work); |
531 | flush_scheduled_work(); |
532 | debugfs_remove(tps->file); |
533 | kfree(tps); |
534 | i2c_set_clientdata(client, NULL); |
535 | the_tps = NULL; |
536 | return 0; |
537 | } |
538 | |
539 | static int tps65010_probe(struct i2c_client *client, |
540 | const struct i2c_device_id *id) |
541 | { |
542 | struct tps65010 *tps; |
543 | int status; |
544 | struct tps65010_board *board = client->dev.platform_data; |
545 | |
546 | if (the_tps) { |
547 | dev_dbg(&client->dev, "only one tps6501x chip allowed\n"); |
548 | return -ENODEV; |
549 | } |
550 | |
551 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
552 | return -EINVAL; |
553 | |
554 | tps = kzalloc(sizeof *tps, GFP_KERNEL); |
555 | if (!tps) |
556 | return -ENOMEM; |
557 | |
558 | mutex_init(&tps->lock); |
559 | INIT_DELAYED_WORK(&tps->work, tps65010_work); |
560 | tps->client = client; |
561 | tps->model = id->driver_data; |
562 | |
563 | /* the IRQ is active low, but many gpio lines can't support that |
564 | * so this driver uses falling-edge triggers instead. |
565 | */ |
566 | if (client->irq > 0) { |
567 | status = request_irq(client->irq, tps65010_irq, |
568 | IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_FALLING, |
569 | DRIVER_NAME, tps); |
570 | if (status < 0) { |
571 | dev_dbg(&client->dev, "can't get IRQ %d, err %d\n", |
572 | client->irq, status); |
573 | goto fail1; |
574 | } |
575 | /* annoying race here, ideally we'd have an option |
576 | * to claim the irq now and enable it later. |
577 | * FIXME genirq IRQF_NOAUTOEN now solves that ... |
578 | */ |
579 | disable_irq(client->irq); |
580 | set_bit(FLAG_IRQ_ENABLE, &tps->flags); |
581 | } else |
582 | dev_warn(&client->dev, "IRQ not configured!\n"); |
583 | |
584 | |
585 | switch (tps->model) { |
586 | case TPS65010: |
587 | case TPS65012: |
588 | tps->por = 1; |
589 | break; |
590 | /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */ |
591 | } |
592 | tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG); |
593 | show_chgconfig(tps->por, "conf/init", tps->chgconf); |
594 | |
595 | show_chgstatus("chg/init", |
596 | i2c_smbus_read_byte_data(client, TPS_CHGSTATUS)); |
597 | show_regstatus("reg/init", |
598 | i2c_smbus_read_byte_data(client, TPS_REGSTATUS)); |
599 | |
600 | pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME, |
601 | i2c_smbus_read_byte_data(client, TPS_VDCDC1), |
602 | i2c_smbus_read_byte_data(client, TPS_VDCDC2), |
603 | i2c_smbus_read_byte_data(client, TPS_VREGS1)); |
604 | pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME, |
605 | i2c_smbus_read_byte_data(client, TPS_DEFGPIO), |
606 | i2c_smbus_read_byte_data(client, TPS_MASK3)); |
607 | |
608 | i2c_set_clientdata(client, tps); |
609 | the_tps = tps; |
610 | |
611 | #if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG) |
612 | /* USB hosts can't draw VBUS. OTG devices could, later |
613 | * when OTG infrastructure enables it. USB peripherals |
614 | * could be relying on VBUS while booting, though. |
615 | */ |
616 | tps->vbus = 100; |
617 | #endif |
618 | |
619 | /* unmask the "interesting" irqs, then poll once to |
620 | * kickstart monitoring, initialize shadowed status |
621 | * registers, and maybe disable VBUS draw. |
622 | */ |
623 | tps->nmask1 = ~0; |
624 | (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1); |
625 | |
626 | tps->nmask2 = TPS_REG_ONOFF; |
627 | if (tps->model == TPS65013) |
628 | tps->nmask2 |= TPS_REG_NO_CHG; |
629 | (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2); |
630 | |
631 | (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f |
632 | | i2c_smbus_read_byte_data(client, TPS_MASK3)); |
633 | |
634 | tps65010_work(&tps->work.work); |
635 | |
636 | tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL, |
637 | tps, DEBUG_FOPS); |
638 | |
639 | /* optionally register GPIOs */ |
640 | if (board && board->base != 0) { |
641 | tps->outmask = board->outmask; |
642 | |
643 | tps->chip.label = client->name; |
644 | tps->chip.dev = &client->dev; |
645 | tps->chip.owner = THIS_MODULE; |
646 | |
647 | tps->chip.set = tps65010_gpio_set; |
648 | tps->chip.direction_output = tps65010_output; |
649 | |
650 | /* NOTE: only partial support for inputs; nyet IRQs */ |
651 | tps->chip.get = tps65010_gpio_get; |
652 | |
653 | tps->chip.base = board->base; |
654 | tps->chip.ngpio = 7; |
655 | tps->chip.can_sleep = 1; |
656 | |
657 | status = gpiochip_add(&tps->chip); |
658 | if (status < 0) |
659 | dev_err(&client->dev, "can't add gpiochip, err %d\n", |
660 | status); |
661 | else if (board->setup) { |
662 | status = board->setup(client, board->context); |
663 | if (status < 0) { |
664 | dev_dbg(&client->dev, |
665 | "board %s %s err %d\n", |
666 | "setup", client->name, status); |
667 | status = 0; |
668 | } |
669 | } |
670 | } |
671 | |
672 | return 0; |
673 | fail1: |
674 | kfree(tps); |
675 | return status; |
676 | } |
677 | |
678 | static const struct i2c_device_id tps65010_id[] = { |
679 | { "tps65010", TPS65010 }, |
680 | { "tps65011", TPS65011 }, |
681 | { "tps65012", TPS65012 }, |
682 | { "tps65013", TPS65013 }, |
683 | { "tps65014", TPS65011 }, /* tps65011 charging at 6.5V max */ |
684 | { } |
685 | }; |
686 | MODULE_DEVICE_TABLE(i2c, tps65010_id); |
687 | |
688 | static struct i2c_driver tps65010_driver = { |
689 | .driver = { |
690 | .name = "tps65010", |
691 | }, |
692 | .probe = tps65010_probe, |
693 | .remove = __exit_p(tps65010_remove), |
694 | .id_table = tps65010_id, |
695 | }; |
696 | |
697 | /*-------------------------------------------------------------------------*/ |
698 | |
699 | /* Draw from VBUS: |
700 | * 0 mA -- DON'T DRAW (might supply power instead) |
701 | * 100 mA -- usb unit load (slowest charge rate) |
702 | * 500 mA -- usb high power (fast battery charge) |
703 | */ |
704 | int tps65010_set_vbus_draw(unsigned mA) |
705 | { |
706 | unsigned long flags; |
707 | |
708 | if (!the_tps) |
709 | return -ENODEV; |
710 | |
711 | /* assumes non-SMP */ |
712 | local_irq_save(flags); |
713 | if (mA >= 500) |
714 | mA = 500; |
715 | else if (mA >= 100) |
716 | mA = 100; |
717 | else |
718 | mA = 0; |
719 | the_tps->vbus = mA; |
720 | if ((the_tps->chgstatus & TPS_CHG_USB) |
721 | && test_and_set_bit( |
722 | FLAG_VBUS_CHANGED, &the_tps->flags)) { |
723 | /* gadget drivers call this in_irq() */ |
724 | (void) schedule_work(&the_tps->work.work); |
725 | } |
726 | local_irq_restore(flags); |
727 | |
728 | return 0; |
729 | } |
730 | EXPORT_SYMBOL(tps65010_set_vbus_draw); |
731 | |
732 | /*-------------------------------------------------------------------------*/ |
733 | /* tps65010_set_gpio_out_value parameter: |
734 | * gpio: GPIO1, GPIO2, GPIO3 or GPIO4 |
735 | * value: LOW or HIGH |
736 | */ |
737 | int tps65010_set_gpio_out_value(unsigned gpio, unsigned value) |
738 | { |
739 | int status; |
740 | unsigned defgpio; |
741 | |
742 | if (!the_tps) |
743 | return -ENODEV; |
744 | if ((gpio < GPIO1) || (gpio > GPIO4)) |
745 | return -EINVAL; |
746 | |
747 | mutex_lock(&the_tps->lock); |
748 | |
749 | defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO); |
750 | |
751 | /* Configure GPIO for output */ |
752 | defgpio |= 1 << (gpio + 3); |
753 | |
754 | /* Writing 1 forces a logic 0 on that GPIO and vice versa */ |
755 | switch (value) { |
756 | case LOW: |
757 | defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */ |
758 | break; |
759 | /* case HIGH: */ |
760 | default: |
761 | defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */ |
762 | break; |
763 | } |
764 | |
765 | status = i2c_smbus_write_byte_data(the_tps->client, |
766 | TPS_DEFGPIO, defgpio); |
767 | |
768 | pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME, |
769 | gpio, value ? "high" : "low", |
770 | i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO)); |
771 | |
772 | mutex_unlock(&the_tps->lock); |
773 | return status; |
774 | } |
775 | EXPORT_SYMBOL(tps65010_set_gpio_out_value); |
776 | |
777 | /*-------------------------------------------------------------------------*/ |
778 | /* tps65010_set_led parameter: |
779 | * led: LED1 or LED2 |
780 | * mode: ON, OFF or BLINK |
781 | */ |
782 | int tps65010_set_led(unsigned led, unsigned mode) |
783 | { |
784 | int status; |
785 | unsigned led_on, led_per, offs; |
786 | |
787 | if (!the_tps) |
788 | return -ENODEV; |
789 | |
790 | if (led == LED1) |
791 | offs = 0; |
792 | else { |
793 | offs = 2; |
794 | led = LED2; |
795 | } |
796 | |
797 | mutex_lock(&the_tps->lock); |
798 | |
799 | pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, |
800 | i2c_smbus_read_byte_data(the_tps->client, |
801 | TPS_LED1_ON + offs)); |
802 | |
803 | pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, |
804 | i2c_smbus_read_byte_data(the_tps->client, |
805 | TPS_LED1_PER + offs)); |
806 | |
807 | switch (mode) { |
808 | case OFF: |
809 | led_on = 1 << 7; |
810 | led_per = 0 << 7; |
811 | break; |
812 | case ON: |
813 | led_on = 1 << 7; |
814 | led_per = 1 << 7; |
815 | break; |
816 | case BLINK: |
817 | led_on = 0x30 | (0 << 7); |
818 | led_per = 0x08 | (1 << 7); |
819 | break; |
820 | default: |
821 | printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n", |
822 | DRIVER_NAME); |
823 | mutex_unlock(&the_tps->lock); |
824 | return -EINVAL; |
825 | } |
826 | |
827 | status = i2c_smbus_write_byte_data(the_tps->client, |
828 | TPS_LED1_ON + offs, led_on); |
829 | |
830 | if (status != 0) { |
831 | printk(KERN_ERR "%s: Failed to write led%i_on register\n", |
832 | DRIVER_NAME, led); |
833 | mutex_unlock(&the_tps->lock); |
834 | return status; |
835 | } |
836 | |
837 | pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, |
838 | i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs)); |
839 | |
840 | status = i2c_smbus_write_byte_data(the_tps->client, |
841 | TPS_LED1_PER + offs, led_per); |
842 | |
843 | if (status != 0) { |
844 | printk(KERN_ERR "%s: Failed to write led%i_per register\n", |
845 | DRIVER_NAME, led); |
846 | mutex_unlock(&the_tps->lock); |
847 | return status; |
848 | } |
849 | |
850 | pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, |
851 | i2c_smbus_read_byte_data(the_tps->client, |
852 | TPS_LED1_PER + offs)); |
853 | |
854 | mutex_unlock(&the_tps->lock); |
855 | |
856 | return status; |
857 | } |
858 | EXPORT_SYMBOL(tps65010_set_led); |
859 | |
860 | /*-------------------------------------------------------------------------*/ |
861 | /* tps65010_set_vib parameter: |
862 | * value: ON or OFF |
863 | */ |
864 | int tps65010_set_vib(unsigned value) |
865 | { |
866 | int status; |
867 | unsigned vdcdc2; |
868 | |
869 | if (!the_tps) |
870 | return -ENODEV; |
871 | |
872 | mutex_lock(&the_tps->lock); |
873 | |
874 | vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2); |
875 | vdcdc2 &= ~(1 << 1); |
876 | if (value) |
877 | vdcdc2 |= (1 << 1); |
878 | status = i2c_smbus_write_byte_data(the_tps->client, |
879 | TPS_VDCDC2, vdcdc2); |
880 | |
881 | pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off"); |
882 | |
883 | mutex_unlock(&the_tps->lock); |
884 | return status; |
885 | } |
886 | EXPORT_SYMBOL(tps65010_set_vib); |
887 | |
888 | /*-------------------------------------------------------------------------*/ |
889 | /* tps65010_set_low_pwr parameter: |
890 | * mode: ON or OFF |
891 | */ |
892 | int tps65010_set_low_pwr(unsigned mode) |
893 | { |
894 | int status; |
895 | unsigned vdcdc1; |
896 | |
897 | if (!the_tps) |
898 | return -ENODEV; |
899 | |
900 | mutex_lock(&the_tps->lock); |
901 | |
902 | pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME, |
903 | mode ? "enable" : "disable", |
904 | i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); |
905 | |
906 | vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1); |
907 | |
908 | switch (mode) { |
909 | case OFF: |
910 | vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ |
911 | break; |
912 | /* case ON: */ |
913 | default: |
914 | vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ |
915 | break; |
916 | } |
917 | |
918 | status = i2c_smbus_write_byte_data(the_tps->client, |
919 | TPS_VDCDC1, vdcdc1); |
920 | |
921 | if (status != 0) |
922 | printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", |
923 | DRIVER_NAME); |
924 | else |
925 | pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, |
926 | i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); |
927 | |
928 | mutex_unlock(&the_tps->lock); |
929 | |
930 | return status; |
931 | } |
932 | EXPORT_SYMBOL(tps65010_set_low_pwr); |
933 | |
934 | /*-------------------------------------------------------------------------*/ |
935 | /* tps65010_config_vregs1 parameter: |
936 | * value to be written to VREGS1 register |
937 | * Note: The complete register is written, set all bits you need |
938 | */ |
939 | int tps65010_config_vregs1(unsigned value) |
940 | { |
941 | int status; |
942 | |
943 | if (!the_tps) |
944 | return -ENODEV; |
945 | |
946 | mutex_lock(&the_tps->lock); |
947 | |
948 | pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, |
949 | i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); |
950 | |
951 | status = i2c_smbus_write_byte_data(the_tps->client, |
952 | TPS_VREGS1, value); |
953 | |
954 | if (status != 0) |
955 | printk(KERN_ERR "%s: Failed to write vregs1 register\n", |
956 | DRIVER_NAME); |
957 | else |
958 | pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, |
959 | i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); |
960 | |
961 | mutex_unlock(&the_tps->lock); |
962 | |
963 | return status; |
964 | } |
965 | EXPORT_SYMBOL(tps65010_config_vregs1); |
966 | |
967 | int tps65010_config_vdcdc2(unsigned value) |
968 | { |
969 | struct i2c_client *c; |
970 | int status; |
971 | |
972 | if (!the_tps) |
973 | return -ENODEV; |
974 | |
975 | c = the_tps->client; |
976 | mutex_lock(&the_tps->lock); |
977 | |
978 | pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME, |
979 | i2c_smbus_read_byte_data(c, TPS_VDCDC2)); |
980 | |
981 | status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value); |
982 | |
983 | if (status != 0) |
984 | printk(KERN_ERR "%s: Failed to write vdcdc2 register\n", |
985 | DRIVER_NAME); |
986 | else |
987 | pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, |
988 | i2c_smbus_read_byte_data(c, TPS_VDCDC2)); |
989 | |
990 | mutex_unlock(&the_tps->lock); |
991 | return status; |
992 | } |
993 | EXPORT_SYMBOL(tps65010_config_vdcdc2); |
994 | |
995 | /*-------------------------------------------------------------------------*/ |
996 | /* tps65013_set_low_pwr parameter: |
997 | * mode: ON or OFF |
998 | */ |
999 | |
1000 | /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not |
1001 | required if power supply is through a battery */ |
1002 | |
1003 | int tps65013_set_low_pwr(unsigned mode) |
1004 | { |
1005 | int status; |
1006 | unsigned vdcdc1, chgconfig; |
1007 | |
1008 | if (!the_tps || the_tps->por) |
1009 | return -ENODEV; |
1010 | |
1011 | mutex_lock(&the_tps->lock); |
1012 | |
1013 | pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n", |
1014 | DRIVER_NAME, |
1015 | mode ? "enable" : "disable", |
1016 | i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG), |
1017 | i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); |
1018 | |
1019 | chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG); |
1020 | vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1); |
1021 | |
1022 | switch (mode) { |
1023 | case OFF: |
1024 | chgconfig &= ~TPS65013_AUA; /* disable AUA bit */ |
1025 | vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ |
1026 | break; |
1027 | /* case ON: */ |
1028 | default: |
1029 | chgconfig |= TPS65013_AUA; /* enable AUA bit */ |
1030 | vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ |
1031 | break; |
1032 | } |
1033 | |
1034 | status = i2c_smbus_write_byte_data(the_tps->client, |
1035 | TPS_CHGCONFIG, chgconfig); |
1036 | if (status != 0) { |
1037 | printk(KERN_ERR "%s: Failed to write chconfig register\n", |
1038 | DRIVER_NAME); |
1039 | mutex_unlock(&the_tps->lock); |
1040 | return status; |
1041 | } |
1042 | |
1043 | chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG); |
1044 | the_tps->chgconf = chgconfig; |
1045 | show_chgconfig(0, "chgconf", chgconfig); |
1046 | |
1047 | status = i2c_smbus_write_byte_data(the_tps->client, |
1048 | TPS_VDCDC1, vdcdc1); |
1049 | |
1050 | if (status != 0) |
1051 | printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", |
1052 | DRIVER_NAME); |
1053 | else |
1054 | pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, |
1055 | i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); |
1056 | |
1057 | mutex_unlock(&the_tps->lock); |
1058 | |
1059 | return status; |
1060 | } |
1061 | EXPORT_SYMBOL(tps65013_set_low_pwr); |
1062 | |
1063 | /*-------------------------------------------------------------------------*/ |
1064 | |
1065 | static int __init tps_init(void) |
1066 | { |
1067 | u32 tries = 3; |
1068 | int status = -ENODEV; |
1069 | |
1070 | printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION); |
1071 | |
1072 | /* some boards have startup glitches */ |
1073 | while (tries--) { |
1074 | status = i2c_add_driver(&tps65010_driver); |
1075 | if (the_tps) |
1076 | break; |
1077 | i2c_del_driver(&tps65010_driver); |
1078 | if (!tries) { |
1079 | printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME); |
1080 | return -ENODEV; |
1081 | } |
1082 | pr_debug("%s: re-probe ...\n", DRIVER_NAME); |
1083 | msleep(10); |
1084 | } |
1085 | |
1086 | return status; |
1087 | } |
1088 | /* NOTE: this MUST be initialized before the other parts of the system |
1089 | * that rely on it ... but after the i2c bus on which this relies. |
1090 | * That is, much earlier than on PC-type systems, which don't often use |
1091 | * I2C as a core system bus. |
1092 | */ |
1093 | subsys_initcall(tps_init); |
1094 | |
1095 | static void __exit tps_exit(void) |
1096 | { |
1097 | i2c_del_driver(&tps65010_driver); |
1098 | } |
1099 | module_exit(tps_exit); |
1100 | |
1101 |
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